What percentage of the worlds population lives in the US?

According to Wikipedia, the United States of America is home to 4.44% of the earth's population with more than 317,000,000 people (as of March 2014).

According to the U.S. Census Bureau, as of March 2014 there are roughly 317,700,000 living in the U.S. out of 7,150,000,000 people living in the entire world (these numbers change constantly). Divide the number of people in the U.S. by the number of people in the world and multiply by 100 to get your answer.

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